The Cook Inlet Historical Society is one of Alaska's oldest regional historical organizations. Founded March 30, 1955, at the Z.J. Loussac Library in Anchorage, it soon acquired collections through donations of artifacts and art by several long-time Alaskans. Using these collections as a nucleus, the Society opened a museum in the library on September 11, 1955.
The collections grew. In the early 1960s, the Society museum moved to the City Hall Annex. In 1968, the Cook Inlet Historical Society cooperated with the City of Anchorage to found the Anchorage Museum at Rasmuson Center.
Since that time, the Society has headquartered in the Museum. Monthly programs on the third Thursday of each month from September through May are a highlight of Society activities. The Society also supports publication of books on Alaskan history, which are available in the Museum Shop.